This volume contains the proceedings of the 2nd International Conference on Affective Computing and Intelligent Interaction (ACII 2007) held in Lisbon, Portugal, September 12 14, 2007. The 1st International Conference on Affective Computing and Intelligent Interaction was held in Beijing, China, in 2005.Following its success, in 2007 ACII was organized by the Humaine Network of Excellence as a meeting point for - searchers studying and developing the role of emotion and other affective p- nomenainmanydi?erentareas.Amongtheseareas, ACII2007featuredpapersin a?ective human computer and human robot interaction, computer graphics for recognizing and expressing emotions, emotion-based AI architectures, robotics, vision, speech, synthetic characters, games, educational software, and others.By investigatingnewtheoriesandmechanismsthroughwhichwecancreatemachines that are able to recognize, model and express emotions and other a?ective p- nomena, we hope to contribute towards the creation of machines that allow for the establishment of sustainable and a?ective relations with humans. ACII2007receivedatotalof151papers.Fromthese,57wereacceptedaslong papers and 4 as short papers. Due to the high quality of papers, the conference also included poster presentations, which are published as extended abstracts in this volume. Although this is a new multidisciplinary ?eld, the number and quality of submitted and accepted papers was evidence of its rapid maturation. This year the ACII also featured a Doctoral Consortium, which received 20 papers that were published separately from these proceedings."
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